Left atrial myxoma

left atrial myxoma is a benign tumor located in the left upper chamber of the heart (atrium) on the wall that separates the left chamber from the right (the atrial septum). .

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Right atrial myxomas are sometimes associated with tricuspid stenosis and atrial fibrillation.

Atrial myxoma is a cardiac tumor involving the connective tissue within the heart's upper chambers (atria). The tumor may be located in the right or left atrium. (See also Atrial myxoma - left.)

Causes, incidence, and risk factors

Atrial myxoma are the most common primary cardiac tumor, but metastatic tumors of the heart are far more common than primary. The tumor is derived from multipotential mesenchymal cells and may cause a ball-valve obstruction.

Women are more likely to be affected than men. Some atrial myxomas are inherited. Family history is a risk factor.

About 75% of cardiac myxomas are in the left atrium (atrial myxoma - left), and the rest are in the right atrium. Right atrial myxomas are sometimes associated with tricuspid stenosis and atrial fibrillation.